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“Super” Trees for Rocky Mountain Landscapes
Jeremy Valdez & Keith Williamson
Denver, CO | February 5 – 8
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“Super”Includes:
–More than 1 Season of Interest and Characteristic Appeal
–Multiple Forms, Habits, Textures– Hardiness (Soil, Water, Drought, Exposure)– Colorful (Bloom, Bark, Fruit, Foliage)
Denver, CO | February 5 – 8
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• Acer x fremanii – Freeman Maple – Autumn Blaze
• I.D. – Palmate Leaf, Opposite, Gray Bark • Super Tree – Growth Rate – Hybrid Vigor– Fall Color– Gray, Striped Bark Pattern
Denver, CO | February 5 – 8
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• Acer ginnala – Ginnala/Amur Maple • I.D. – Opposite, 3 Palmate lobes, Samaras • Super Tree – Fall Color– Alkaline Tolerant – Irregular Habit – Few Diseases / Insects
Denver, CO | February 5 – 8
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• Acer tataricum – Tatarian Maple – Hot Wings
• I.D. – Opposite, Simple Leaves, Samaras • Super Tree – Samara Color – Fall Color – Irregular Habit – Few Diseases / Insects – Alkaline Tolerant
Denver, CO | February 5 – 8
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• Amelanchier – Servicberry – Autumn Brilliance, Spring Flurry
• I.D. –Alternate, Rounded Leaves, Pointed Buds• Super Tree – Early Spring Flowers– Summer Fruit – Fall Color – Birds, Bees & Wildlife
Denver, CO | February 5 – 8
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• Catalpa speciosa – Western Catalpa • I.D. – Large, Heart Shaped Leaves, Persistant
Seed Pods• Super Tree – Larger White Summer Flowers– Brown Pods Through Winter - Summer– Fast Growing – Drought Tolerant
Denver, CO | February 5 – 8
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• Crataegus – Hawthorn – Russian, Thornless Cockspur, Winter King…
• I.D. – Alternate, Thorns, Fruits • Super Tree– Clustered White Flowers– Fruit: Color, Persistance– Fall Color
Denver, CO | February 5 – 8
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• Gleditsia tricanthos – Honeylocust – Shademaster, Imperial, Skyline…
• I.D. – Alternate, Pinnate & Bi-Pinnate Leaves • Super Tree– Filtered Light– Fall Color – Seedless– Bark
Denver, CO | February 5 – 8
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• Gymnocladus dioicus – Kentucky Coffee Tree • I.D. – Alternate, Pinnate Leaves,
Dioecious (Espresso = male) • Super Tree– Filtered Light– Fall Color – Texture: Winter/Summer– Bark
Denver, CO | February 5 – 8
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• Malus - Crabapple • I.D. – Alternate, Smooth Buds• Super Tree– Spring Flowers– Summer Fruit – Fall Color: Leaf, Fruit, Foliage– Various Shapes, Sizes, & Habits
Denver, CO | February 5 – 8
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• Picea pungens – Colorado Spruce • I.D. – Short Whorled Needles = Prickly • Super Tree– Evergreen – Colors Blue & Green – Various Forms, Sizes, & Habits
Denver, CO | February 5 – 8
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• Picea abies – Norway Spruce • I.D. – Whorled Needles = Softer• Super Tree– Evergreen – Colors Blue & Green – Various Forms, Sizes, & Habits
Denver, CO | February 5 – 8
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• Pinus nigra – Austrian Pine • I.D. – Long Whorled Needles, 2 Needs per
Fascicle (rarely 3) • Super Tree– Evergreen – Forms & Habits– Sizes
Denver, CO | February 5 – 8
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• Pinus mugo – Mugo Pine • I.D. – 2 Needles per Fascicle, Clusters of
Cylindrical Buds• Super Tree– Evergreen – Forms – Sizes
Denver, CO | February 5 – 8
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• Prunus cerasifera – Newport Plum• I.D. – Alternate, Purple-Red Leaves, Buds in
Clusters • Super Tree– Early Spring Flowers (Pale Pink)– Summer Fruit (Purple / Edible) – Fall Color
Denver, CO | February 5 – 8
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• Prunus virginiana ‘Shubert’ – Canada Red Chokecherry
• I.D. – Alternate, Foliage Green to Purple• Super Tree– Early Spring Flowers – Summer Fruit: Attracts Birds– High Elevation
Denver, CO | February 5 – 8
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• Pyrus calleryana – Ornamental Pear – Chanticleer, New Bradford, Aristocrat…
• I.D. – Alternate, Glossy Foilage, Columnar Habit
• Super Tree– Early White Spring Flowers - One of 1st to Show– Summer Fruit, Persistent, Tiny– Fall Color – Last to drop
Denver, CO | February 5 – 8
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• Quercus macrocarpa – Bur Oak • I.D. – Corky Bark, Acorns in a hairy/mossy cup,
‘Staked Leaves’, Deep Sinuses • Super Tree– Size – Texture– Hardiness– Alkaline Tolerant
Denver, CO | February 5 – 8
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• Quercus robur – English Oak • I.D. – Alternate, Lobed Leaves, Elongated
Acorns on Long Rachis• Super Tree– Form– Persistent Foliage Early to Mid-Winter– Alkaline Tolerant
Denver, CO | February 5 – 8
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• Sorbus aucuparia – European Mtn. Ash • I.D. – Pinnate Leaves, • Super Tree– Summer Flower Clusters – Yields Dense Bunches of Fruit – Fall Color – Glossy Bark– High Elevation
Denver, CO | February 5 – 8
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• Tilia – Linden • I.D. – Alternate, Pyramidal Habit, Heart-
Shaped Leaves • Super Tree– Summer aromatic Flowers – Fall Color – Habit
Denver, CO | February 5 – 8